Collection System and Treatment Facilities

The materials presented provide background information regarding the current collection system and treatment facilities. The most pressing current and anticipated future challenges are also summarized:

Chapter 4 [PDF] where current and future challenges are identified and discusse , such as population growth, aging facilities, sea level rise, and seismic reliability, which impact the San Francisco collection system and treatment and discharge facilities.

Fourteen Technical Memoranda that include a BioWin™ modeling information, collection system assessment, and outfall analysis. Five collection system Technical Memoranda will be finalized in the coming months and posted as they are finalized.

TM 200 Series

TM 201 [PDF] presents the results of the rapid seismic assessment of buildings and building-like structures performed by Structus Consulting Engineers during site visits.

TM 501 [PDF] documents the efforts to develop a collection system model that represents the configuration and historical performance of San Francisco’s combined sewer system.

TM 502 [PDF] presents the general modeling approach that is proposed to assess and analyze the drainage in the seven focus areas as well as evaluate alternatives for improvement.

TM 503 [PDF] the purpose of this assessment of drainage control policies, procedures, and guidelines is to gain a thorough understanding of how well current and past practices have served the City, and to recommend, where appropriate, changes in design criteria and storm flow management practices.

TM 504 [PDF] presents the existing conditions in the seven focus areas as well as provide a preliminary assessment of needs for improvement.

TM 505 [PDF] presents the alternatives that the Detailed Drainage Modeling Plan (DDMP) team has selected to improve flooding problems in the study focus areas.

TM 506 [PDF] is an analysis of sewer age and condition that was undertaken to identify planning level costs to address the annual rehabilitation and replacement needs for the sewers, which were not to be otherwise addressed by SSMP projects.

TM 507 [PDF] on combined vs separate sewer and stormwater quality. This TM examines the option of sewer separation in terms of service to users, receiving water impacts, regulatory guidance and direction, previously committed resources and achievements, options available going forward, their advantages and disadvantages, illustrative case studies and a summary assessment.

TM 509 [PDF] documents the historical activation frequency, discharge volume, and impact of San Francisco’s combined sewer discharges (CSDs) on the receiving waters of the Pacific Ocean and San Francisco Bay.

TM 510 [PDF] provides a review of the challenges of large scale, wet weather disinfection practice including disinfectant options; pilot and full scale experience; outfall consolidation opportunities; and potential public health and environmental benefits and associated risks.

TM 511 [PDF] describes the goals of the Flood Control and Stormwater Management Program. This program was designed to reduce flooding to the extent practicable by identifying and targeting problem areas, prioritizing flood relief projects, optimizing existing facilities and conditions, and supplementing and modifying existing facilities where needed.

TM 512 [PDF] reports the results of a historic tide data analysis, the findings of an extensive literature review of the effects of global warming on future climate changes (more specifically the subsequent rise in sea level), and the estimated costs to retrofit the combined sewer system discharges with Tideflex® duckbill valves to prevent backflow into the system due to high tide levels.

TM 700 Series

TM 701 [PDF] presents the study aimed to to assess the feasibility of different disinfection alternatives for existing and potential future scenarios at each of three wastewater treatment facilities serving the City and County of San Francisco (City). The evaluation will consider the feasibility of each alternative in terms of capital cost, footprint, and effluent quality.
*Appendix D [PDF] – Reference List

TM 702 [PDF] provides review of inspection reports for the North Point Outfall (NPO), Southeast Bay Outfall (SBO) and Southwest Ocean Outfall (SWOO) operated by the SFPUC. It also provides conclusions regarding remaining useful life and actions that SFPUC should undertake to maintain and protect these key resources.

TM 703 [PDF] presents alternatives for disposing of effluent on the Bay side of San Francisco, with discharge capacities of 200 to 260 million gallons per day (mgd) at North Point Facility (NPF) and 200 to 400 mgd at the Southeast Plant (SEP).

TM 704 [PDF] provides information on the regulatory implications and permitting processes involved with conducting activities to maintain, upgrade, and change locations of Bayside outfalls (i.e. the Southeast Plant deep-water outfall at Pier 80 and the North Point dual outfalls.

TM 705 [PDF] presents the results of mathematical dilution simulations for the San Francisco Southwest Ocean Outfall for various oceanographic conditions, flow rates, and diffuser configurations.

Twelve appendices that give further detailed information in support of the report chapters, including detailed seismic assessment information.

Appendix K [PDF] provides information pertaining to sewer tunnels that are not part of the collection system’s tranport/storage system.

Appendix L [PDF] provides additional operating data for both Southeast Water Pollution Control Plant and Oceanside Water Pollution Control Plant and process design features for all three treatment plants.